Window 10 KB4346084 applies to Windows t0 version 1803.
Intel recently announced that they completed their validations and have started to release microcode for recent CPU platforms that are related to Spectre Variant 3a (CVE-2018-3640: “Rogue System Register Read (RSRE)”), Spectre Variant 4 (CVE-2018-3639: “Speculative Store Bypass (SSB)”), L1TF (CVE-2018-3620, CVE-2018-3646: “L1 Terminal Fault”). In addition to microcode updates previously released in KB4100347 to address Spectre Variant 2 (CVE 2017-5715: “Branch Target Injection”), this update also includes microcode updates from Intel for the following CPUs.
- Kaby Lake
- Coffee Lke
It seems that older processors are not being patched with this update. Intel has indicated it has abandoned more and more processors over the last few months due to problems galore with faults.